UNU Enerpak Micro 2800mAh USB External Battery Pack - [Black / Silver] Backup External Rechargeable Power Battery Charger For iPhone 6, iPhone 6 Plus, iPhone 5S / 5 / 4S / 4 This powerful device can fit inside a pocket or purse and is perfect for on-the-go use, yet, still boasts the ability to re-charge almost any USB product including tablets and smartphones. Using a 1A USB port to charge almost any USB device, the Enerpak Micro contains a 2800mAh battery which can effectively charge most electronics at relatively fast speeds. While the integrated colorful microUSB cable provides a unique stylish look, it also enables users to charge any compatible device without carrying an additional separated cord. Designed with the best battery material, and most reliable circuit design, the Enerpak Micro is a safe and reliable source of re-chargeable power which can be recharged more than 500 times. Made to be the perfect travel companion the Enerpak Series Battery Packs are plug-n-play, charges your iPhones, iPods and iPads, and all USB powered devices on-the-go at any location that you need for a quick boost.